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OMMUNICATION
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ANUAL
FC9Y-B1730
Modbus TCP Server
When the FC6A Series MicroSmart is configured as the Modbus TCP server, Modbus TCP client devices can read/write data to the
FC6A Series MicroSmart. When the FC6A Series MicroSmart receives a valid request from a Modbus TCP client device, the data is
read or written according to the request received. The communication data received from Modbus TCP clients is processed at the
END processing of the user program.
Modbus TCP Server Specifications
*1 The number when all eight connections are set to Modbus TCP server.
Map of Slave Addresses for the Modbus TCP Server
Modbus TCP client can access the Modbus devices (Coil, Input Relay, Input Register, and Holding Register) of Modbus server to
read or write the device data (I, Q, M, R, T, C, and D) of FC6A Series MicroSmart. Refer to the following table to configure the
Modbus TCP clients.
*1 Slave addresses in communication are 4-digit values used in the address portion of the communication frame. Subtract 1 from the lower 5 digits
of the slave address and store that value in hexadecimal. For details, see "Modbus RTU Slave Communication" on page 6-8.
*2 Access within the device range for the FC6A Series MicroSmart type used.
Parameter Modbus TCP Server
Slave Number Ignored
Response Time 1.5 ms
Number of Clients that can Access Simultaneously
*1
8 (1 client per 1 connection)
Port Number 502 (can be changed between 0 and 65535)
Supported Function Code
01 Read Coil Status
02 Read Input Status
03 Read Holding Registers
04 Read Input Registers
05 Force Single Coil
06 Preset Single Register
15 Force Multiple oils
16 Preset Multiple Registers
Modbus Device Name Slave Addresses
Slave Addresses in
Communication
*1
FC6A Series MicroSmart Device
*2
Applicable
Function Code
Coil
(000000 and above)
000001 - 000504 0000 - 01F7 Q0 - Q627
1,5,15
000701 - 000956 02BC - 03BB R000 - R255
001001 - 003048 03E8 - 0BE7 M0000 - M2557
003049 - 007400 0BE8 - 1CE7 M2560 - M7997
009001 - 009256 2328 - 2427 M8000 - M8317
011001 - 017000 2AF8 - 4267 M10000 - M17497
Input Relay
(100000 and above)
100001 - 100504 0000 - 01F7 I0 - I627
2
101001 - 101256 03E8 - 04E7 T000 - T255 (timer contact)
101501 - 101756 05DC - 06DB C000 - C255 (counter contact)
102001 - 102768 07D0 - 0ACF T256 - T1023 (timer contact)
104001 - 104256 0FA0 - 109F C256 - C511 (counter contact)
Input Register
(300000 and above)
300001 - 300256 0000 - 00FF T000 - T255 (timer current value)
4
300501 - 300756 01F4 - 02F3 C000 - C255 (counter current value)
302001 - 302768 07D0 - 0ACF T256 - T1023 (timer current value)
304001 - 304256 0AF0 - 10A0 C256 - C511 (counter current value)
Holding Register
(400000 and above)
400001 - 408000 0000 - 1F3F D0000 - D7999
3,6,16
408001 - 408500 1F40 - 2133 D8000 - D8499
409001 - 409256 2328 - 2427 T000 - T255 (timer preset value)
3
409501 - 409756 251C - 261B C000 - C255 (counter preset value)
410001 - 456000 2710 - DABF D10000 - D55999 3,6,16
462001 - 462768 F230 - F52F T256 - T1023 (timer preset value)
3
464001 - 464256 FA00 - FAFF C256 - C511 (counter preset value)